Comparison

Engineering Formulas vs TU/eMechE

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Engineering Formulas

Features
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EngiRef is the all-in-one engineering reference app that works 100% offline. Access formulas, material properties, reference tables, and a powerful unit converter - all without internet connection. FORMULA LIBRARY Browse 140+ essential engineering formulas organized by discipline: • Mechanical Engineering: stress, strain, torque, power, gear ratios, spring design • Electrical Engineering: Ohm's law, AC/DC circuits, impedance, resonance • Civil/Structural: beam deflection, Euler buckling, Manning's equation • Thermodynamics: ideal gas law, Carnot efficiency, heat transfer • Fluid Mechanics: Bernoulli, Reynolds number, Darcy-Weisbach • Materials Science: Young's modulus, Poisson's ratio, fatigue analysis BUILT-IN CALCULATOR Enter your values and get instant results. Every calculation shows step-by-step solutions so you understand the process, not just the answer. Perfect for learning and exam preparation. MATERIALS DATABASE Access properties for 55+ engineering materials: • Carbon steels (AISI 1018, 1045, 4140, 4340) • Stainless steels (304, 316, 17-4 PH) • Aluminum alloys (6061-T6, 7075-T6, 2024-T3) • Titanium, copper, nickel alloys • Plastics (ABS, HDPE, Nylon, PEEK, Delrin) • Composites, concrete, and wood Compare up to 3 materials side-by-side with density, tensile strength, elastic modulus, thermal conductivity, and more. REFERENCE TABLES • Bolt specifications: Metric M3-M36, SAE/Imperial sizes • Pipe schedules: NPS dimensions and wall thickness • Wire gauges: AWG 0000-40 with ampacity ratings UNIT CONVERTER Convert between 16 categories including length, pressure, temperature, force, energy, flow rate, and viscosity. Accessible from any screen via slide-over panel. PHYSICAL CONSTANTS Quick reference for 34 constants including speed of light, gravitational constant, Boltzmann constant, Avogadro's number, and more. QUIZ MODE Test your knowledge with flashcard-style quizzes. Track progress across all disciplines. Prepare for FE and PE exams. ADDITIONAL FEATURES • Dark and light themes (follows system setting) • Favorites to bookmark frequently used formulas • Calculation history with timestamps • Create and save custom formulas • Export and share your data • LaTeX formula rendering • iPad-optimized layouts PRIVACY FOCUSED EngiRef collects zero personal data. No analytics, no ads. All your calculations and favorites stay on your device. We believe engineering tools should respect your privacy. Whether you are a student preparing for exams, a working engineer needing quick field reference, or a technician looking for material specs, EngiRef puts essential engineering knowledge in your pocket. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

TU/eMechE

Features
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A quick-reference app for staff and students of the Department of Mechanical Engineering at Eindhoven University of Technology. Find staff information, news, educational resources, and TU/e campus buildings.

Screenshots

Engineering Formulas4 screens
TU/eMechE3 screens

Verdict

The call

The clearest difference is in-app purchases: TU/eMechE at none against Engineering Formulas's 3. TU/eMechE also leads on update cadence (weekly vs every 2 months). Engineering Formulas's advantage is iOS requirement (15.1 vs 17.6). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Engineering Formulas sells 3 in-app purchases, starting at $4.99 per 7 days. TU/eMechE asks for nothing beyond the download.

UpkeepUpdate frequency

Engineering Formulas ships an update every 2 months, TU/eMechE weekly. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 3 level
Engineering Formulas versus TU/eMechE: the parameters behind the verdict, then further details
ParameterEngineering FormulasTU/eMechE
PriceFreeFree
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better17.6
Further details — not scored
Size45 MB18 MB
Age rating12+4+
DeveloperMobin AkhterEindhoven University of Technology

In-app purchases

3 purchases

Engineering Formulas

Subscriptions2
  • Weekly Premium$4.997 Days
  • Yearly Premium$29.991 Year
One-time1
  • Lifetime Access$54.99
None

TU/eMechE

No in-app purchases

Questions

Is Engineering Formulas free?
Engineering Formulas is free to download, with in-app purchases available.
Is TU/eMechE free?
TU/eMechE is free to download, with no in-app purchases.
Do Engineering Formulas or TU/eMechE have ads?
Neither Engineering Formulas nor TU/eMechE shows ads.
Which is updated more often, Engineering Formulas or TU/eMechE?
Engineering Formulas ships an update every 2 months, and TU/eMechE weekly. Most recently, Engineering Formulas was updated on October 4, 2026 and TU/eMechE on October 7, 2026.

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